[/size]Flight Simulator X was released in two editions: Standard and Deluxe. The later released Gold Edition was merely a marketing package rather than a "version" as it contains both the Deluxe Edition and the Acceleration expansion pack (only one of which may be installed). Compared to the Standard Edition, the Deluxe Edition incorporates additional features, including an on-disc software development kit (SDK), three airplanes with the Garmin G1000 Flightdeck, and the ability for the player to act as Air traffic control (ATC) for other online users with a radar screen.[9][10]